To Claim the Throne

This is an entry in the May/June 2009 Print-and-Play Dice Game contest. See: http://www.boardgamegeek.com/thread/405493 Two rival families each lay claim to a kingdom’s rule. In order to settle this dispute, the two families agree that the family that can claim the most thrones among the kingdom’s five provinces will rule the entire kingdom. However, that does not mean the families agreed to play fair. Only a ruler fit to sit in the throne can claim that throne, and each family has the power to change the requirement for the thrones -- even with a rival already sitting on it! Can your family claim enough thrones to claim the kingdom?